GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A light year is the distance light travels in 365 Earth days, and we have observed galaxies that are billions of light years away from us.How does our understanding of the speed of light support the Big Bang model?
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Modern technology allows us to travel faster than light to examine the early universe.
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Einstein’s equation (E=mc2) showed energy converted into matter at light speed.
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Due to this speed limit, we can look back in time to see how the universe formed.
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This cosmic speed limit explains how gravity formed the first galaxies.
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Explanation:
Detailed explanation-1: -We know that light takes time to travel, so that if we observe an object that is 13 billion light years away, then that light has been traveling towards us for 13 billion years. Essentially, we are seeing that object as it appeared 13 billion years ago.
Detailed explanation-2: -A light year is the distance light travels in one year (365 days). It often gets misused as a unit of time, likely because ‘year’ is right there in the name. It will always take light 1 year to travel a distance of 1 light year.
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